Difference between revisions of "Weirs"

Latest revision as of 17:16, 3 July 2019

The most common form of weir in LID practices is a rectangular weir, in the form of a check dam or flow control in a swale or other open channel.

The flow (Q), may be calculated by measuring the height of water on the sill of the weir:

$Q={\frac {2}{3}}C_{d}\cdot L{\sqrt {2g}}\cdot H^{\frac {3}{2}}$

Where:

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-Weird
+The most common form of weir in LID practices is a rectangular weir, in the form of a [[check dam]] or flow control in a [[swale]] or other open channel.
+The flow (Q), may be calculated by measuring the height of water on the sill of the weir:
+<math>Q=\frac{2}{3}C_{d}\cdot L\sqrt{2g}\cdot H^{\frac{3}{2}}</math>
+{{Plainlist|1=Where:
+*''C<sub>d</sub>'' = discharge coefficient (default 0.62 for a 'sharp edge).
+*''L'' = Length of the weir (m)
+*''g'' = Acceleration due to gravity (9.81 m/s<sup>2</sup>)
+*''H'' = Height of water over the weir (m)}}
+==More flow related pages==
+*[[Flow in a swale]]
+*[[Flow through perforated pipe]]
+*[[Flow through an orifice]]